linux as well, actually).
* base libpthread definitions are now in ptypes.inc, included in unixtype
They sometimes have an extra underscore in front of their name, in
case they were also exported by the packages/base/pthreads unit, so
they can keep their original name there
* cthreadds unit now imports systuils, because it uses exceptions (it
already did so before as well)
* fixed many linux definitions of libpthread functions in pthrlinux.inc
(integer -> cint etc)
+ added culonglong type to ctype.inc
Turned out to be not entirely the same as *BSD's (constants with
different names, existing and non existing constants), so I decided to
make it platform dependant.
